1N4743A-T

Overview

The Vishay General Semiconductor - Diodes Division 1N4743A-T is a single silicon Zener diode designed for voltage regulation and reference applications. It features a nominal Zener voltage of 13 V with a tolerance of 5% at a test current of 19 mA. The device dissipates up to 1 W of power in the DO-201AD (DO-41) axial through-hole package. Key electrical characteristics include a maximum reverse leakage current of 5 uA and a Zener impedance of 10 Ohms. It operates within a temperature range of -65 °C to +200 °C.

Feature Summary

• Provides stable voltage regulation using a single unidirectional Zener junction
• Engineered for high thermal stability across an extended operating temperature range
• Constructed with a glass passivated junction for reliable performance

Applications

• Voltage reference circuits requiring precise potential levels
• Overvoltage protection stages in electronic systems
• General-purpose voltage regulation in power supplies

Procurement Notes

Verify the specific suffix 'T' against the official Vishay datasheet to confirm tape-and-reel packaging specifications, as standard 1N4743A devices often utilize bulk packaging. Ensure the requested quantity aligns with the manufacturer's minimum reel size requirements. Cross-reference the RoHS compliance status and REACH SVHC declarations directly with the latest product documentation to meet regulatory standards.

Selection Notes

Select this component when a 13 V regulated potential is required in a through-hole assembly. The 1 W power rating supports moderate current loads without excessive heat sinking. Verify that the 5% voltage tolerance meets the circuit design margins. Consider the DO-41 package dimensions for PCB layout constraints and ensure the operating environment stays within the specified -65 °C to +200 °C range.

Part Context

This part belongs to the widely recognized 1N47xx series of Zener diodes, a standard family used extensively in industrial and consumer electronics. Manufactured by Vishay, it adheres to established JEDEC outlines for the DO-41 package. The series is known for consistent manufacturing quality and broad availability across multiple distributors, serving as a fundamental discrete semiconductor component for basic circuit protection and regulation tasks.

Replacement Considerations

Compatible substitutes include the 1N4743A from onsemi, Nexperia, or Rectron, provided they match the 13 V, 1 W, and DO-41 specifications. For surface-mount needs, the GLL4743-E3/97 offers equivalent electrical parameters in a DO-213AB package. Verify pin compatibility and thermal dissipation capabilities before swapping manufacturers.